Failed Windows Defender updates

Might be amongst the minority that uses Windows Defender but recently, some of its latest definition updates have failed and the ones in question were Version 1.337.2.0 and 1.339.21.0 which was offered to me today. To explain this further though... they actually failed upon being downloaded (as I can choose what I want downloaded and installed) and when I tried again, it doesn't seem to be downloading at all (stuck at 0% progress for a few minutes). I suspect that a definition update was available and then it was shortly taken down from the Update Catalog or something, hence that error message on Windows Update.

Hope I'm not the only one experiencing this... but at least the two updates before the latest installed successfully.


  • They are failing on my computer too , so its not just you.
  • Ah, okay then.

    Hopefully just a minor blip going on...
  • Yeah I've seen it a couple of times. Usually starts working the next day.
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